NC0081957_Wasteload Allocation_19920806

NPDES DOCUMENT :MCANNINO COVER SHEET
NPDES Permit:
NC0081957
Narrows Powerhouse
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Report
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
August 6, 1992
Thia document its printed on reuese paper - ignore *my -
content on the reYerose'side

NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NC0081957
PERMI ITEE NAME:
FACILITY NAME:
Yadkin Inc.
Narrows Powerhouse
Facility Status: Existing
Permit Status: New
Major
Pipe No.: 004
Minor '1
Design Capacity: 0.0005 MGD
Domestic (% of Flow): 100 %
Industrial (% of Flow):
c.0un14 14Lo ouTFAU.S 1kEnao To Kept,&¢ -
Comments:
Domestis discharge from power house, they plan to install a
Cromaglass CA-5 WWT Unit with filter and chlorinator. See drawing.
RECEIVING STREAM: the Yadkin River
Class: WS-III and B
Sub -Basin: 03-07-08
Reference USGS Quad: F18NE
County: lvtillnunTerY St":AAQ L
Regional Office. =-FayettevrklRegional-@fftee M (O
Previous Exp. Date: 00/00/00 Treatment Plant Class:
Classification changes within three miles:
no change within three miles.
Requested by:
Prepared by:
Reviewed by:
Randy Kepler
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L L�iL ur�F/1 e
Di,. 13 5 (5(w)
(please attach)
Date: 4/16/92
Date: 074-/I Z.-
Date.:
Modeler
Date Rec.
#
SA u1
1-0 (G k 2-
Ia
)
°
Drainage Area (mi2 ) N R
Avg. Streamflow (cfs):
7Q10 (cfs) Winter 7Q10 (cfs) 30Q2 (cfs)
Tit FLOW
-No Rcc?ta]a-et>
Ali AS. a L.G se
Toxicity Limits: IWC % Acute/Chronic
Instream Monitoring:
Parameters
Upstream Location
Downstream Location
Effluent
Characteristics
Summer
Winter
BOD5 (mg/1)
30
3o
NH3-N (mg/1)
D.O. (mg/1)
TSS (mg/1)
-e,
3o
F. Col. (/100 ml)
200
Zoo
pH (SU)
6 - 1
6 - 9
pLo7rTfin..
D.
Comments: Ltnti]75 AR- A To C is i S i& t
AXID FAc-t L I Ty is I k1 oP T,oN.

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474
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YADKIN, INC.
NARROWS POWERHOUSE
LOCATION MAP
SCALE: 1" =2000'
einoe
ogroultiv - mod Wadies
.0
1
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TALLA55EE LAKE
(1) CURRENTLY PERMITTED AS OUTFALL 007,
NPDES PERMIT NO. NC 0004308
(2) WWT SYSTEM PLANS ATTACHED
OUTFALL
NO,
001 (1)
002 (1)
003
004 (2)
005 CO
DAILY DISCHARGE,
GALLONS
864,000
86,400
2,880
500
950,400
DISCHARGE
TYPE
YADKIN
RIVER
a
Generators I & II Cooling Water
Generators I & II Thrust Bearing Cooling Water
Sump Drain
Treated Domestic Wastewater
Generators III & IV Cooling and
Thrust Bearing Cooling Waters
YADKIN, INC.
NARROWS POWERHOUSE
SITE PLAN
SCALE: N.T. S.
mn.Wt.Yp w'Wwr.., rn�om��,hY .af ntLb

C. 1LtT.'OV NATt71AL;
RESOURCES AND
COMMUNITY DEVELOPMENT
Facility Name:
NPDES No.:
Type of Waste:
Facility Status:
Permit Status:
Receiving Stream:
Stream Classification:
Subbasin:
County:
Regional Office:
Requestor:
Date of Request:
Topo Quad:
FACT SHEET FOR WASTELOAD ALLOCATION
Narrows Powerhouse/Yadkin, I
NC0081957
Domestic - 100%
Existing
New
Yadkin River
WS-III & B
030708 efr
'l'kc3
KeplerR. `
4/16/92
F18NE
Request #
nc (/tI-c-0R)
JUN 1 6 1992
so
MIL E ELM*1 �1FFJCE
Stream Characteristic:
USGS #
Date:
Drainage Area (mi2):
Summer 7Q10 (cfs):
Winter 7Q10 (cfs):
Average Flow (cfs):
30Q2 (cfs):
IWC (%):
no min release on
FERC
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
Narrows Powerhouse discharges right below the dam at Badin Lake. Per DWR (5/92), no
minimum release exists in their 1958 FERC license, although Yadkin, Inc is required to maintain ‘a)
release of at least 150 cfs from Blewett Falls (many miles downstream). Previous WLA's for -n
these discharges stated that Yadkin Inc. was required to maintain a minimum release of 1400 cfs
from Badin Lake (This may be self-imposed and will be used by TSB).
Due to "B" waters classification, Fecal coliform limits must be applied to the domestic discharge.
Sp ial Schedule Requirements and additional comments from Reviewers:
•. , -; r 1,, ..%' l over / a e.: , .' >o
/Y%ti/s" 4/
Recommended by: �.4^.-A,. /. Date: 6�S�g2-
Reviewed by
Instream Assessment:
Regional Supervisor:
Permits & Engineering:
RETURN TO TECHNICAL SERVICES BY:
JUL 0 4 1992
JUN 1 1 15'92
ENV. MANAGEMENT
PAYETTEVILLE REG. OFFICE
MEI)

2
Recommended Limits:
Monthly Average
Summer Winter WQ or EL
Wasteflow (MGD): 0.0005 0.0005
BOD5 (mg/1): 30 30
NH3N (mg/1):
DO (mg/1):
TSS (mg/1): 30 30
Fecal Col. (/100 m1): 200 200
pH (SU): 6-9 6-9
Residual Chlorine (4/1):
Oil & Grease (mg/1):
TP (mg/1):
TN (mg/1):
Limits Changes Due To: Parameter&) Affected
Change in 7Q10 data
Change in stream classification
Relocation of discharge
Change in wasteflow
Other (onsite toxicity study, interaction, etc.)
Instream data
New regulations/standards/procedures
New facility information
Parameter(s) are water quality limited. For some parameters, the available load capacity of
the immediate receiving water will be consumed. This may affect future water quality based
effluent limitations for additional dischargers within this portion of the watershed.
OR
X No parameters are water quality limited, but this discharge may affect future allocations.

3
INSTIZEAM MONITORING REQUIREMENTS
Upstream Location:
Downstream Location:
Parameters:
Special instream monitoring locations or monitoring frequencies:
MISCELLANEOUS INFORMATION & SPECIAL CONDPITONS
Adequacy of Existing Treatment
Has the facility demonstrated the ability to meet the proposed new limits with existing treatment
facilities? Yes No OM
If no, which parameters cannot be met?
Would a "phasing in" of the new limits be appropriate? Yes No to/A
If yes, please provide a schedule (and basis for that schedule) with the regional
office recommendations:
If no, why not?
Special Instructions or Conditions
Wasteload sent to EPA? (Major) _N (Y or N)
(If yes, then attach schematic, toxics spreadsheet, copy of model, or, if not modeled, then old
assumptions that were made, and description of how it fits into basinwide plan)
Additional Information attached? _N (Y or N) If yes, explain with attachments.

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DIVISION OF ENVIRONMENTAL MANAGEMENT
June 5, 1992
MEMORANDUM
TO: Randy Kepler
FROM: Susan A. Wilson/
THROUGH: Ruth Swanek
Carla Sanderson
SUBJECT: Yadkin, Inc. Powerhouses (ALCOA)
Falls, Narrows, Tuckertown
NC0081922, NC0081957, NC0081949
Cooling Water Outfalls and Sump Drain Outfalls
After discussion with Mike Parker of the Mooresville Regional Office (MRO), the cooling
water discharges from the powerhouses should receive the standard cooling water
language. This applies to any generator cooling water, thrust bearing cooling water, and
any other type cooling water. Please refer to the staff report when assigning outfall
numbers for these discharges.
BMP's will be employed for the discharge from the sump drains at the powerhouses. The
MRO recommends no effluent monitoring for those outfalls. Technical Support concurs
with this request, as long as the facility continues to change the oil absorbent pads at least
quarterly and cleans the oil sumps at least annually, as suggested in their BMP's. Because
the discharges are below the dams on the Yadldn River, minimal impact is expected from
the sump drain outfalls.
The domestic discharges for Falls Powerhouse (NC0081922) and Narrows Powerhouse
(NC0081957) are addressesed in separate wasteload allocations.
cc: Mike Parker, MRO